Buggy code:
} public interface Comparer { int compare ( Object a , Object b ) { } } private static final String ARGUMENTS_DELIMITER = "#" ; private static final String EMPTY_ARGUMENT = "<seq2seq4repair_space>" ; private static char [ ] [ ] JAVA_LIKE_EXTENSIONS ; private static final char [ ] BOOLEAN = "boolean" . toCharArray ( ) ; private static final char [ ] BYTE = "byte" . toCharArray ( ) ; private static final char [ ] CHAR = "char" . toCharArray ( ) ; private static final char [ ] DOUBLE = "double" . toCharArray ( ) ; private static final char [ ] FLOAT = "float" . toCharArray ( ) ; private static final char [ ] INT = "int" . toCharArray ( ) ; private static final char [ ] LONG = "long" . toCharArray ( ) ; private static final char [ ] SHORT = "short" . toCharArray ( ) ; private static final char [ ] VOID = "void" . toCharArray ( ) ; private static final char [ ] INIT = "<init>" . toCharArray ( ) ; private Util ( ) { } public static final String [ ] arrayConcat ( String [ ] first , String second ) { } private static int checkTypeSignature ( String sig , int start , int end , boolean allowVoid ) { } public static int combineHashCodes ( int hashCode1 , int hashCode2 ) { } public static int compare ( byte [ ] a , byte [ ] b ) { } public static int compare ( char [ ] str1 , char [ ] str2 ) { } public static String concat ( String s1 , char c , String s2 ) { } public static String concat ( String s1 , String s2 ) { } public static final String concatWith ( String [ ] array , char separator ) { } public static final String concatWith ( String [ ] array , String name , char separator ) { } public static String concat ( String s1 , String s2 , String s3 ) { } public static String convertTypeSignature ( char [ ] sig , int start , int length ) { } public static String defaultJavaExtension ( ) { } public static final String editedString ( String original , TextEdit edit ) { } public static final boolean endsWithIgnoreCase ( String str , String end ) { } public static boolean equalArrays ( Object [ ] a , Object [ ] b , int len ) { } public static boolean equalArraysOrNull ( int [ ] a , int [ ] b ) { } public static boolean equalArraysOrNull ( Object [ ] a , Object [ ] b ) { } public static boolean equalArraysOrNullSortFirst ( Util . Comparable [ ] a , Util . Comparable [ ] b ) { } public static boolean equalArraysOrNullSortFirst ( String [ ] a , String [ ] b ) { } public static boolean equalOrNull ( Object a , Object b ) { } public static boolean equalsIgnoreJavaLikeExtension ( String fileName , String string ) { } public static String extractLastName ( String qualifiedName ) { } public static String [ ] extractParameterTypes ( char [ ] sig ) { } public static String extractReturnType ( String sig ) { } private static IFile findFirstClassFile ( IFolder folder ) { } public static String findLineSeparator ( char [ ] text ) { } public static IClassFileAttribute getAttribute ( IClassFileReader classFileReader , char [ ] attributeName ) { } public static IClassFileAttribute getAttribute ( ICodeAttribute codeAttribute , char [ ] attributeName ) { } public static IClassFileAttribute getAttribute ( IFieldInfo fieldInfo , char [ ] attributeName ) { } public static IClassFileAttribute getAttribute ( IMethodInfo methodInfo , char [ ] attributeName ) { } public static char [ ] [ ] getJavaLikeExtensions ( ) { } public static long getJdkLevel ( Object targetLibrary ) { } public static String getNameWithoutJavaLikeExtension ( String fileName ) { } public static String getLineSeparator ( String text , IJavaProject project ) { String lineSeparator = null ; <START_BUG> if ( text != null ) { <END_BUG> lineSeparator = Util . findLineSeparator ( text . toCharArray ( ) ) ; if ( lineSeparator != null ) return lineSeparator ; } IScopeContext [ ] scopeContext ; if ( project != null ) { scopeContext = new IScopeContext [ ] { new ProjectScope ( project . getProject ( ) ) } ; lineSeparator = Platform . getPreferencesService ( ) . getString ( Platform . PI_RUNTIME , Platform . PREF_LINE_SEPARATOR , null , scopeContext ) ; if ( lineSeparator != null ) return lineSeparator ; } scopeContext = new IScopeContext [ ] { new InstanceScope ( ) } ; lineSeparator = Platform . getPreferencesService ( ) . getString ( Platform . PI_RUNTIME , Platform . PREF_LINE_SEPARATOR , null , scopeContext ) ; if ( lineSeparator != null ) return lineSeparator ; return org . eclipse . jdt . internal . compiler . util . Util . LINE_SEPARATOR ; } private static String getLineSeparator ( char [ ] text , char [ ] buffer ) { } public static int getParameterCount ( char [ ] sig ) { } public static String getProblemArgumentsForMarker ( String [ ] arguments ) { } public static String [ ] getProblemArgumentsFromMarker ( String argumentsString ) { } public static byte [ ] getResourceContentsAsByteArray ( IFile file ) throws JavaModelException { } public static char [ ] getResourceContentsAsCharArray ( IFile file ) throws JavaModelException { } public static char [ ] getResourceContentsAsCharArray ( IFile file , String encoding ) throws JavaModelException { } public static String getSignature ( Type type ) { } public static String getDeclaringTypeSignature ( String key ) { } private static void getFullyQualifiedName ( Type type , StringBuffer buffer ) { } public static String [ ] getTrimmedSimpleNames ( String name ) { }

Fix:
if ( ( text != null ) && ( ( text . length ( ) ) != 0 ) ) {